PSR.ri bits 3 are reserved, change to 3 will break kernel.
The patch ignore such change, if you thought access_urea should return
an error in the case, please let me know.
Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
--- a/arch/ia64/kernel/ptrace.c 2007-08-27 05:48:49.000000000 +0800
+++ b/arch/ia64/kernel/ptrace.c 2007-08-27 05:57:42.000000000 +0800
@@ -951,10 +951,14 @@ access_uarea (struct task_struct *child,
return 0;
case PT_CR_IPSR:
- if (write_access)
- pt->cr_ipsr = ((*data & IPSR_MASK)
+ if (write_access) {
+ unsigned long tmp = *data;
+ /* psr.ri bits 11 are reserved, ingore the change */
+ if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
+ tmp &= ~IA64_PSR_RI;
+ pt->cr_ipsr = ((tmp & IPSR_MASK)
| (pt->cr_ipsr & ~IPSR_MASK));
- else
+ } else
*data = (pt->cr_ipsr & IPSR_MASK);
return 0;
-
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